Instagram page account

Hi,I own a dog page on Instagram,would it be permissible to repost dog photos,most owners don’t mind their content being posted and there is no copyright stated

What is the purpose of the page?

My hobby is to post on Instagram and grow accounts they are just used for fun sometimes revenue from ads and want to use it to market products

Would this be permissible I’ve messaged multiple dog accounts if I can use their photos and they’ve agreed and on insta copyright isn’t stated too so I’m not sure

Is this permissible or not?