Something I tested: Some familiars are on multiple categories. All of them have the same model. (As opposed to, there being different colours of cats, dogs, chickens, etc.)
There's also a scorpion familiar! The imp and fire mephit get it.
Cat:
![Image](https://cdn.discordapp.com/attachments/467111747287777292/863905658902806559/unknown.png)
Mouse:
![Image](https://cdn.discordapp.com/attachments/467111747287777292/863908501718171658/unknown.png)
Toad:
![Image](https://cdn.discordapp.com/attachments/467111747287777292/863911395757654086/unknown.png)
Scorpion:
![Image](https://cdn.discordapp.com/attachments/467111747287777292/863912199473856532/unknown.png)
Dog:
![Image](https://cdn.discordapp.com/attachments/467111747287777292/863913506054340628/unknown.png)
Attack dog:
![Image](https://cdn.discordapp.com/attachments/467111747287777292/863914574544371732/unknown.png)
Worg:
![Image](https://cdn.discordapp.com/attachments/467111747287777292/863917864817393674/unknown.png)
Krenshar:
![Image](https://cdn.discordapp.com/attachments/467111747287777292/863923271304347708/unknown.png)
Jaguar:
![Image](https://cdn.discordapp.com/attachments/467111747287777292/863926121518858270/unknown.png)
Chicken:
![Image](https://cdn.discordapp.com/attachments/652141526385950731/863928819006308362/unknown.png)
Falcon:
![Image](https://cdn.discordapp.com/attachments/652141526385950731/863932012195479562/unknown.png)
Parrot:
![Image](https://cdn.discordapp.com/attachments/467111747287777292/863934773046411284/unknown.png)
Tiny slime:
![Image](https://cdn.discordapp.com/attachments/467111747287777292/863937529122914344/unknown.png)
Tiny myconid:
![Image](https://cdn.discordapp.com/attachments/652141526385950731/863940184839946252/unknown.png)
Spider:
![Image](https://cdn.discordapp.com/attachments/652141526385950731/863943486725554246/unknown.png)
Snake:
![Image](https://cdn.discordapp.com/attachments/652141526385950731/863946939278819328/unknown.png)