Shit... My dog eats apples. With seeds, naturally. Since I now live in a dacha (summer cottage) and there are 6 apple trees on the site, which are now dropping ripe apples every day, I can't even control her.
Random animal fact #13
A medium-sized dog would need to chew up and swallow about 85 grams of seeds, or the seeds from about 200 apples for it to be fatal.
So it should be fine but it is better to be on the safe side and remove the seeds.