My height slider:
-Works on large breed and small breed dogs.
-Works with vanilla custom clothing, and any CC clothing that has a working UV1 deformer map. (Layman's terms, scales with the dog sliders.)
-Affects genetic inheritance, sometimes with strange and terrible results in the case of corgi leg inheritance. Be the back yard breeder you never wanted to be! Or breed traits you actually like. Corgi x non corgi with height slider can inherit corgi (if small dog) or height slider. Height slider x height slider picks one of the parent's values to use. Sometimes puppies (who are not suppose to show the sliders) show the sliders anyway, but they will be fine when they grow up.
-*Works with poses.
-Goes in both directions, so you can make medium sized dogs from large breeds, huge great dane height, and everything in between. That also means you can scale small breed dogs smaller/larger to make teacup chihuahuas and medium sized dogs as well! Perfect if you're recreating an unusual mixed breed from IRL.

It took me 15.5 hours to make the corgi slider and 2.5 hours to make the great dane/'giant' dog slider. (Over the course of a few days.) I swear my family didn't see me for a day, haha. This thing was sucking the life out of me, I started begging it to just work so I could stop working on it. It's hard to have to load the game to see results, tweak a small setting to see if it fixed an issue, rinse and repeat until all the tiny tweaks add up, hours and hours.

The goal (this is what morph maker was SHOWING me it should look like...):

..But then I released the (eventually finished) mod to some willing photographers from the servers I venture and the aweeeee worthy photos just kept coming and made it all worthwhile. It's too hard to even pick which one showcases the corgi slider the best because ALL OF THEM ARE ADORABLE.
Like so cute that my perfectionist good friend loaded up the game, turned on the slider and went 'dont use this pic but look at the dachshund aww!'

Some making of notes.

There was a height slider back in 2019, for whatever reason it stopped working for some people and not other people, some things changed and it went out of date in general. When I set out to make my own height slider, I wanted to make it completely unique, and funnily the more I hammered and hammered away at it the more the mods started to look the same because there is only one way you can really do the setting and have it work in game otherwise the legs bend in the wrong direction, so you fiddle with this thing, then you need to fix the mesh in the other direction to compensate for doing that thing, and viola same solutions. One thing that is more noticeably different is my maxed size dogs are much bigger.

Tech Notes

*Tech note 1: Dogs in TS4 have two separate 'touch points'. One when they are standing, and one when they are sitting or laying down. When the size of the dog passes a certain threshold, the 'touch points' for sitting and standing start to get farther apart so you can line up your dog with one or the other, but not both. I chose to line them up with STANDING because feet clipping the ground irritate me. Thus at some points, the dog either is above the floor (the huge dogs) or clips into it (the small dogs) but ONLY when sitting/laying. The corgi is actually lined up with the laying/sitting and slightly floats above the ground so it is quite animation friendly! If you use poses on teacup or giant dogs, their floating/sinking will translate into the pose, and is not the pose's fault. It is working as intended. Maybe use tool mod to raise or lower props to get perfect photos!

*Tech note 2: There are TWO -different- corgi sliders. One I call Corgi Float and the other I call Corgi Ground. Corgi float is the one described above and shows up in most of these screenshots and it is mostly only for the corgi breed, or fluffy dogs. Corgi Ground is a short-leg slider with feet touching the ground instead, but the animations sometimes clip into the ground because of it. This one is good for thin breeds or breeds that need a lot of manual body slider tweaking that Corgi Float does not allow for.

Tech note 3: There are TWO different versions of this mod. ONLY USE ONE VERSION. V2 removes the Corgi Ground and only has Corgi Float because some people get very frustrated over sliders that do too much and having height sliders, corgi 1, and corgi 2 is a learning curve. Since most people will probably use Corgi Float, V2 is provided for your ease of use and is super duper user friendly! If you swap the versions later and notice a change in your dog, just take it back to create a pet with full edit mode on, and use the slider on it again to reset its pose.

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Slider Usage Instructions
Height Slider: This slider will become available to you when viewing the dog from the side directly. Hover the mouse over the dog, and when you can select the WHOLE body (whole dog mostly turns white) click and drag to make the dog taller or shorter.

Corgi Slider: Look at the dog from the hind side, with the tail facing you. NOW grab the whole body and use the slider(s).
Do not use the height slider first if you want to use the corgi slider. The height slider will work with Corgi Float but not completely with Corgi Ground. (Experiment and be prepared to press undo a lot while learning the sliders.) Thankfully the people I had testing and photographing did not have any difficulties, so most people should easily grasp the sliders without issue!
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~Credits~
Mod
Pure Winter (Who also referenced work by Pixelpfote to figure out how some of the height slider worked on small breeds.)
Indirect credit to CmarNYC for TS4 MorphMaker

Mod Photography
Kai (Corgi, the fancy pics with detail.)
BB (Great Dane / Dachshund)
Peter Griffin (Height slider breed comparison)
*Any 'plain' regular old game photos Pure Winter took.

Mod Testing
Peter Griffin (Helped find so many issues in early development.)
Aeeja Board (Tested genetics, NPC spawning/adopting from pound (They dont spawn in the 'wild', so far at least), the pajama agility debacle.)

Thank you to Curse Forge, for the November 2023 Top Picks selection of this mod!

[PW] Dog Height Slider and Corgi Leg Mod