Hello,
I apologize for the delay. This case is likely too complicated and difficult to provide much assistance via text.
In all of these cases I think it is best to contact as many local rescues and pet care providers as possible. This might mean reaching out to your local shelter and veterinary college. You can also start a go fund me page. Post on all social media accounts and personal accounts. Start with general practice vet who the rescues recommend. Give them a realistic budget for you. Ask about payment plans and payment plan companies like care credit or vetbilling.com. There are places to help. Keep trying and keep asking.
Hello,
I’m sorry to hear about your cat.
In my experience constipation in cats is always secondary to something else. And in fact very few are actually constipated. It is absolutely imperative that someone competent palpate your cats abdomen or take an Xray to confirm the constipation before you treat for it. People always think it’s constipation and it’s usually poor dietary intake, cachexia or poor muscle mass and usually a few other things.
Constipation in cats feels like a colon full of hard distended feces. This should be confirmed by a rectal exam. The problem with getting this diagnosis incorrect is that all of the things you try to treat it will make everything else inherently worse. Do not give your cat anything until you confirm this and figure out why it happened.
My guess might be you don’t have the diabetes adequately controlled and therefore you are losing muscle mass. This includes the gi tract which can no longer push feces out of the body.
Please find a vet you trust for your cats care.