Custody

Hello, I bought 2 cats with my roommate over a year ago. My roommate was the one working with the foster family and did paperwork while I just payed for the split cost of the two. Throughout the time we just split everything for the cats. She would get the stuff and I would pay for half. The housing situation became toxic staying with the roommates who have severe mental health issues and I could no longer be there. So I would go there and take care of my cat each morning before work. I never physically saw my roommates because they were either gone or sleeping, but they claim since they have not seen me that I am neglecting my cat and refuse to tell me where he is or give him back. I need help in if I should take this to court and guidance. Thank you.

My ex left me abruptly without notice and took her things and the dogs (2) while I was at work. We adopted them together but they are in my name (I paid all the fees). I have paid for most of the vet bills, food and a portion of dog walking fees. She paid for the dog walker for the past 6-8 months because she wanted to use someone else. We lived in SF and she moved them to San Diego. I would have been willing to amicably agree to 50/50 joint custody but was not given the chance. She has blocked my calls and does not respond to email. I am not sure how to proceed.

We are a rescue who want to have our foster cats returned and foster refusing.

If I rescued a puppy and connected with a rescue who I became a foster for the pup I rescued says they dont qualify me to adopt, and I signed a foster contract with, can I get in trouble if I decide to keep the pup since technically I'm the one who rescued it and they havent paid for any medical care or vaccinations?