https://foundthru.com/product-category/dogs/dog-grooming/ – please click any attribute to see the issue.
It causes duplicate content, because it also generates another URL with the same content:
1) https://foundthru.com/product-category/dog-grooming/black/ – currently, incorrect structure
2) https://foundthru.com/product-category/dogs/dog-grooming/black/ – correct structure, parent category SHOULD be always included
Please add parent category to the URL like before.