can chinchillas eat alfalfa timothy hay cubes?

I recently bought my 2 chinchillas alfalfa timothy hay cubes. I perfer the cubes because it makes less mess. Ive been doing some research and have read alfalfa can cause urinary problems for adult chinchillas. But havent been able to find anything regarding alfalfa timothy hay cubes specifically for chins. I also feed them loose timothy hay. Any help please? Thank you!