Yes to fresh peach flesh, with the stone gone
Your puppy can eat peach, and the juicy flesh of a ripe peach is a soft, sweet treat that most puppies take to immediately. As with mango, the preparation decides whether it is safe. Wash the peach thoroughly, cut the flesh away from the stone in slices, then dice those slices small. The stone goes directly into a bin your puppy cannot reach — not onto the counter edge, not into a bowl of trimmings she can investigate later. Give her a few small pieces of flesh and keep the rest of the peach for yourself.
The stone is a double hazard
A peach stone threatens a puppy in two distinct ways. First, it is a physical hazard: rough, oval, and just the size to lodge in a small throat or, if swallowed, to block the intestines — and a blockage is a surgical emergency, not a home remedy situation. Second, the kernel inside the stone belongs to the family of fruit pits that contain compounds the body converts to cyanide; a puppy would need to crack and chew the stone to get at it, but determined puppies do crack things, and there is no reason to run the experiment. Add the leaves and stem of the peach tree to the same avoid list if you have one in the garden.
Fresh peach versus the canned kind
Canned peaches are packed either in juice or in syrup, and the syrup version is the one to rule out completely: slices swimming in sugar syrup deliver a puppy a measure of sweetness she does not need, coating her teeth and crowding out real nutrition. Even peaches canned in juice are a distant second to fresh, since the canning softens away texture and the fruit sits in sweet liquid regardless. Frozen fresh peach pieces you have stoned yourself are a reasonable warm-day alternative and keep their shape well.
Sugar, skin, and sensible portions
Peach flesh is less sugary than mango but still a fruit, and the portion logic is the same: a few small pieces as a treat, a couple of times a week at most, counted within the day's eating rather than added endlessly on top. A puppy who eats half a peach in one sitting is likely to produce a loose stool and may then turn her nose up at dinner.
The first taste, and the signs that need a vet
Offer two or three small pieces after a meal the first time, and watch the rest of the day. Prompt veterinary help is the right move if your puppy gets hold of a whole peach or its stone and then retches, drools, paws at her mouth, vomits, goes quiet, or stops passing stool — that cluster after a stone can mean an obstruction, and it worsens with time rather than resolving. Also call for advice if peach skin or a larger helping triggers repeated vomiting or diarrhea that does not settle within a day, remembering that a small puppy loses ground to dehydration much faster than an adult dog.
Keeping peach season safe around visitors
Peaches arrive in kitchens in bowls on counters, in lunchboxes, and in the hands of guests on garden chairs — exactly puppy height for temptation. The one-line rule that protects her all summer is: flesh only, stone in the bin, few pieces. Posting that rule with her feeding notes in KinsLe through Care Teams before a family gathering means the person who hands your puppy a piece at the picnic table has already cut it the way you would.