Suddenly fussy with bottle?

Cat

My LO is 4 months old and suddenly is very fussy while eating, especially in the morning. She is breast and formula fed. The past few days she will drink an ounce and then come off bottle.

Sometimes she is doing it to look around. Sometimes it's because the dog walks through the room. Sometimes she spots a toy on the table.

I burp her. I have the dog sit on the couch next to us. I change my position. I change her position. I walk around with her and then try again.

Right now we have been trying to finish breakfast for 30 minutes. It seems like she is still hungry but she will just suck for a few seconds and stop. I know she's not going to starve herself but it is frustrating. Help!!