Omega-3 Improves Your Pet Health

My guinea pig lost some hair recently. She has a small bald spot on her one side. I’ve noticed the last few days that she is not as active as she is normally. Her water bottle wasn’t working right and my husband noticed her yelping and staring at the bottle. We fixed her bottle and she drank water for nearly 5 minutes. We are very attached to this little gal as we aren’t allowed cats or dogs in our apartment. We are allowed caged animals. She is feed like a queen. She loves timothy hay. But, she isn’t eating as much. I’m concerned for her health. I had to put down a favorite hamster 2 years ago because of illness. My husband is extremely upset over his little pet. Money is not a problem. We have a good vet who specializes in small animals and is willing to work with us on payments. Should we be concerned about our little lady?
Thanks