He doesn't Seem to like any treats I have

Jusy rescued him yesterday. 6 yo and knows all his commands. Tried to treat but he doesn't seem to like any that I have for my other dogs/ Suggestion?

https://preview.redd.it/9o1s42t6ay6g1.jpg?width=3024&format=pjpg&auto=webp&s=33b7059065bce3056a13bd913a557991c5b9b7da

https://preview.redd.it/avj3qlt6ay6g1.jpg?width=3024&format=pjpg&auto=webp&s=8e24c7467c3d158b6cb399fa7b6ccc83b4ea037f