I watched that last night, too. I thought the woman with the dog was ok - heck, that toddlers in tiaras show came on right after and I personally find that a lot weirder and offensive than one dressing up their pets for pageant shows. As for what she spends on her dog, well at least her dog loves her. People spend a lot more on material items like tvs, appliances, cars, etc.
She seems to have her dog on a good diet, though.
Jenny, the woman with the cats. I mostly saw issues with what she was feeding (Iams dry, fancy feast, lots of treats) and the fact that she had several overweight cats... I don't get the bit about litter boxes, either. 2 hours to scoop? I have four boxes and it takes me 15 minutes, tops, and only because they're in different rooms.
Her boxes also looked filthy (the litter was fine), either she has a kitty with chronic diarrhea or she needs to adopt a box strategy like Momofmany has. She was also buying what appeared to be a jug of enzyme cleaner - too many kitties conflicting with each other or health issues?... who knows.
Debby, the woman with the monkey. Again, overweight. Why do people overindulge animals with "treats"? McDonald's...
If anyone does any reading pet obesity is becoming a more common problem.
Overall they all obviously love their animals and I don't see any of their behaviors as obsessions exactly.