Identifying insects from photographs is difficult to do with any degree of certainty. However, based on its general appearance and the description of the circumstances where they are being encountered, there is a good possibility they are beetles (Order Coleoptera) in the family Dermestidae. Beetles in this family are sometimes called Carpet Beetles or Larder Beetles. The immature stage looks like a grub or caterpillar and it can sometimes be found in dry goods in our pantries or kitchen cupboards. They are also commonly found associated with pet food and/or birdseed. They can even sometimes be found infesting textiles, carpets, or upholstery where they persist on crumbs and other detritus shed by humans. 
If you would like to read more about dermestid beetles including information about how to manage them, you can visit this site from MSU Extension: https://www.canr.msu.edu/resources/carpet-beetles

If you would like to have a specimen identified, you can submit them to the MSU Plant and Pest Diagnostic Laboratory. Information about how to submit specimens can be found on their website at www.pestid.msu.edu.