You're probably going to have to work on getting her to take a bottle, or try to schedule his visits around the child's meals (although I know this is tough with a very young child who eats every few hours.
I've got 4 kids and I know it can be tough getting them on the bottle, but if you keep introducing it, the child will finally take it.
The only way he can change visitation is with a court order, and the only way he can get a court order is if there has been a material change to your situation (remarriage, move, loss of job, or other change to the child's environment) that would give him grounds to seek a modification.
If there have been no changes, he should have no grounds to seek a modificatioin.
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