Found this in my bunnies water bow this morning can anyone tell me what this is/means he’s a 3 month old mini lop on a pellet and hay diet gets plenty of water as well. Just worries me.

Found this in my bunnies water bow this morning can anyone tell me what this is/means he’s a 3 month old mini lop on a pellet and hay diet gets plenty of water as well. Just worries me.

by Exciting-Pen-8712