The title doesn't even cover the half of it.

Basically, I got really sick with the flu for a bit. I couldn't leave my bed. I called up my father and asked him to pick up dog food for me, even texted him a photo of the right one to buy... and he bought the wrong one. I can't return it because he already opened it up and poured a bowl for my dog. My boy is a picky eater so he wouldn't touch it.

When I got the right food though, he wouldn't eat that either, or at least not as enthusiastically as he used to. At first for a few days he'd eat it but wouldn't finish the bowl. Then a few days ago he just stopped eating it entirely. I was shocked because he's been on the same kibble for around two years now and we've never had any issues with that. He would still eat his treats that I give him for practicing tricks and the chews I give him, it was just the kibble he refused.

I called up my vet for advice and she recommended trying the 20 minute rule, which is putting the food down for 20 minutes, ignoring him to give him a chance to eat, and if he doesn't then remove the food and try again a few hours later. Obviously this is done without giving him any other food so I stopped giving him the treats and chews as well. I followed those directions and he wouldn't eat for the whole day. I was hopeful he would be hungry enough the next day that he would eat it, but he still refused it. By this point my dog has been visibly losing weight and obviously it is very concerning.

Yesterday it was suggested I try putting a topper on the kibble. I tried putting some of his treats on there first and he happily gobbled up the treats, but then spit out any kibble on the floor. Then I tried an egg because I thought it might soak into the food and entice him more. He licked up the egg on top and, again, spit out the kibble. I tried some raw food from the pet store as a topper (he was on a raw food diet in the past but had to be switched off because I simply couldn't afford it), but he wouldn't touch it.

Finally today feeling distraught, I bought some new food for him. I know that dogs shouldn't be abruptly switched to a new diet but I was desperate. To my absolute joy, he gobbled it up as happy as can be!

...Then he promptly threw it up. I don't think it's because he's sick because he had no stomach upset from the egg or treats. I believe it's either because it's a new food or because I should have given him a smaller portion to get him used to it. But I could be wrong about that so I'm open to other ideas!

Please, if anyone has any advice, I am really freaking out. I understand pet advice is sensitive to a lot of people but I'm asking because I genuinely love and care about my dog with all my heart. If that wasn't the case, I wouldn't be asking in the first place. I need my little guy to be happy and healthy - that's all I want.