Yes, but also young enough to still be breastfed. It's up to the mother not you when she stops.
Equally, I presume from what you're saying about the age of the baby being relevant that you'd be totally fine with a new born being breastfed uncovered.
Actually, it was a direct response to a point you raised:
"If they need feeding every two to three hours, yes. If they're old enough to eat chicken then chances are they don't"
... So THIS baby did NOT need to be fed every 2 hours at 1 year old and THIS baby should have been eating solid food at 1 year old (a direct response to your points).
Now to answer your new question:
... you'd be totally fine with a new born being breastfed uncovered.
A little reading suggests that breastfeeding uncovered may be slightly better for the baby (that would need to be checked against a more reliable source to establish it as a fact) but whatever the case, I acknowledge that some (or even many) mothers would prefer to breastfeed without a cover. That is completely their right. However, society in general, and Christians in particular, are called to modesty and a woman opening her shirt in public to expose her mammary glands to the world is not modest. When a place is available for her to breastfeed with some privacy and maintain her modesty, the appropriate thing to do is for her to avail herself of such facilities. When she fails to do so in church, it is completely appropriate for one of the older women to correct and instruct her. That is what God commands in scripture, is it not?
Now I also acknowledge that there are times and locations where such an ideal situation is not possible. A ten hour plane ride with an infant needing feeding every two hours comes to mind. In such situations, which are the exception rather than the rule, a small cover as a nod to both discretion and modesty hardly seems like an inappropriate burden to ask to avoid public nudity.
Along the same line as breastfeeding being "natural", there are those who find clothing too stifling and prefer to abandon all garments and live as nature intended. Yet neither society nor the law recognizes all of society as being "clothing optional" and to expose oneself in the presence of children is a very serious crime in many places. Thus God and society recognize the importance of a minimum standard of modesty and female full frontal nudity, whatever the reason, generally violates that standard.
That is what I think.