My guinea pig's diets consist of:
Alfalfa hay, pellets, corn, apples, bananas, papayas (sometimes), melon, lettuce, spinach (very little), celery, kale, carrots, grass (when it grows), cucumber (when we have some) and strawberries...Before I came to cavy cages, I thought all this was good for them. But I've read about how treats should only be occaisional and I shouldn't feed them alfalfa. Well, treats are about 70% of their diet and I haven't had problems with them for 4-5 years. They're very healthy.
Although, I do not want to switch to Timothy. My first guinea pig died due to a heat stroke
() and she may have had a thistle in her throat. It's a hassle to pick out all of the thistles. I think I may look for another kind of hay, and mix it with a little bit of alfalfa. But what hay is good for them other than Timothy?