What age is a good age to start feeding a baby baby food?

Please bear with me. My son has a 4.5 month old baby. He has 50/50 custody and has the baby 50% of the time. Mom is a nut case. Last week he fed the baby some peaches for the first time. She ate the whole jar! She loved them.

A couple of days later Mom called, freaking out because the baby’s poo was not “normal.” Chris told her he’d given the baby peaches in addition to her formula. She freaked out, insisting that babies aren’t ready for baby food until 6 months.

THEN she somehow got a doctor to sign off on not starting the baby on baby food until 6 months, said she was going to sue my son if he did it again.

Is she crazy?

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Some back history, if you’re interested.

She does so many crazy things. When the baby was a month old she was worried because she ate, like 3.5 ounces and the doctor supposedly said she wasn’t supposed to have “more than” 3 ounces. I tried to tell her that the doctor probably said that at least 3 ounces was average and tried to tell her that more than that was OK if they wanted it. She still fretted.

A week ago she accused my son of letting the baby get sun burned (he didn’t.) Her reaction was to feed her pedialyte, perhaps exclusively from Sunday to the following Tuesday at 4:00, when my son got her again. The baby threw up pedialyte first thing. He finally called me Tuesday night, about 3 hours later, concerned because whenever he tried to feed the baby she’d throw it back up…along with pedialyte that he hadn’t fed her. I told him to just wait for a while, and finally about 9 pm she took a bottle and kept it down.

The list goes on and on Honestly…Munchausen Syndrome starts sneaking into my thoughts sometimes….