Short answer: strawberry seeds are tiny enough that removing them isn't strictly necessary, but since strawberries contain sugar, the key is feeding only a small amount appropriate to your dog's weight.
Do I really need to remove strawberry seeds?
Unlike toxic seeds like grape or apple seeds, strawberry seeds are small and non-toxic, so feeding them whole usually isn't a problem. That said, mashing them up is a bit safer for small dogs.
What's the right daily amount to feed?
As a general guideline, no more than 1 strawberry for small dogs, 2–3 for medium dogs, and 4–5 for large dogs, fed in small amounts as a treat, works well.
What should I watch for the first time I feed strawberries?
Start with a very small amount and watch for a few hours to confirm there's no allergic reaction or digestive upset.
Can I feed frozen strawberries?
Frozen strawberries cut into small pieces can make a nice cool treat in summer. Feeding a whole frozen berry can strain the teeth, though, so cutting it small is best.
What signs should I watch for after feeding?
If itching, vomiting, or diarrhea show up afterward, it could be an allergic reaction — stop feeding and consult your vet if symptoms continue.