Would it be ok for 2 guinea pigs to in a cage that is 42x28?

That's a bit tricky to answer without knowing the exact height of the cage.

Here's why:

* Space is important: Guinea pigs need ample space to move around, play, and explore.

* Height matters: While the floor space is important, they also need enough vertical space for climbing and jumping.

Here's a general guideline:

* Minimum: A cage that's at least 7.5 square feet of floor space is considered the minimum for two guinea pigs.

* Ideal: A cage with 10 square feet or more is ideal for two guinea pigs, especially if they are active.

* Height: The cage should be at least 18 inches high.

Your Cage:

* Your cage measures 1176 square inches (42 x 28).

* This is about 8.2 square feet, which is closer to the minimum requirement.

Before you decide:

* Consider the height: If your cage is only 18 inches high, it might be a bit cramped. Aim for at least 24 inches for better enrichment.

* Activity level: If your guinea pigs are very active, a bigger cage is always better.

* Consider cage accessories: The more space you have, the more enrichment you can add with things like hideaways, toys, and tunnels.

Recommendation:

It's possible that your cage could work for two guinea pigs, but it's definitely on the smaller side. You can always make it more spacious by adding a second level or a large playpen for them to explore.