Bug with pets

I think it's because you need other ppl to hug them too

Only hugging them won't do the trick. Have you tried feeding them? Having other people hug them as well? Hugging them multiple times a day? 

My pets are typically happy and I do all these things.

many other people hugged them, they were fully feed but they are still lonly and I know of other people with the same problem on the German site aswell