Does the rug have a rubber backing on it, or under it? Some cats are crazy about peeing on that kind.
If you're going to continue letting the cats into the bedroom, put a litter box over that spot for right now. Slowly, like a few inches a day, move the box to where you want it to be. Clean the...
Ah, I purchased the sonotubes. I'd guess a support every 3' or so would be plenty, depending on if you attached it to the stud and how much weight the supports are rated for.
Mr. Squiggles had one after they found he had a 3rd degree AV block, if I remember right they charged me about $200 for an echo. On the scale of heart murmurs, I've been told that 0 is nothing (obviously) and a 2 is difficult to hear. Smoochie has a grade 2 and our vet has recommended nothing...
Fluoxetine can make a cat really nauseous, maybe that's why his appetite is off. Could he be put on a lower dose to see if that will help with his eating?
Hrm, I've purchased some at Menards before and I wouldn't say they were flimsy at all. Perhaps there are different grades of tubing? Of course if you're thinking of a really long run you'd need some extra supports in the middle anyways, anything will flex if long enough without enough supports.
Try giving her food in a puzzle so it will take her longer to eat? I'm thinking specifically of a food ball, it's like a toy plus food! Can you put a window-mounted bird feeder outside your room to attract more birds? My last thought is cat videos, like the DVD's they sell specifically for cats...
Yes, you'll need a vet for sure. Could be an infection, could be plasma cell pododermatitis. Could be something else entirely!
http://vetbook.org/wiki/cat/index.php?title=Plasma_cell_pododermatitis
You can absolutely overdose a cat with vitamin A, as it's fat-soluble and stays in the body for a long period of time. You need to speak with a vet or a vet nutritionist before giving extra supplements.
Vitamin A poisoning info:
http://www.petmd.com/cat/conditions/toxicity/c_ct_vitamin_a_toxicity