I think you've got the right idea, Jo. I was going to suggest that if anyone was acting "sick" to take them in, but if you say they're all acting normal except for Dakky, it could just be a combination of the heat and the excess hair. Monte, on the other hand, might be doing it just to "fit in" with the big guys. You know how kittens can be such copycats sometimes. Good thing your house is mostly hardwood floors though. I think I hate cleaning up cat puke way worse than I mind cleaning the litter box.

Good luck and I sure hope nothing serious is wrong with Dakky and his little pawsie.