fur loss

So my 5 month old Goldendoodle is acting a little odd. He coughs after drinking water (not sure if that's normal) and he's itching a lot too. He's also been sneezing and when I pull on his fur, it comes out. I'm not sure if he's sick, or if I'm just paranoid. Please help! Thanks!

I have a 11 month old weimapeake (weimaraner Chesapeake bay mix) who has had mild red rashes on her tummy on and off since I got her at 6 weeks old. I just thought it was skin irritation from when she would have accidents in her kennel while potty training. She is still getting the rash though...

hi dogforum community my dog who is a terrier mix has recently been experiencing hair loss at her elbows. she never had fur there originally, or not a lot of it, but recently, her bare patches seem to have become more prominent.. and on one side, there are brown dots.. attaching some pictures...