This is a nice one. Probably my favourite out of all the ones I've seen from you so far (admittedly I haven't seen that much of your work though).
I kinda like the artwork. I can see you do put a decent amount of effort into drawing the characters and the backgrounds. I think you especially do a nice job giving the guinea pigs some facial expressions without making them look more humanoid, although in this particular submission you don't see it as clearly. In any case, if you make as many as you do I can imagine you'd eventually get a little lazy with the drawings, but clearly you don't and I like that.
Overall 4 out of 5. Keep bringing them in. I'm sure plenty of people enjoy them.