My 93 year mother with Alzheimer’s and dementia has trouble swallowing. Is this normal?

Lorettaa, I found this article here on Aging Care:

https://www.agingcare.com/articles/parkinsons-disease-managing-swallowing-issues-431687.htm

My mil says she has trouble swallowing as well. She has had her throat stretched at least 5 times, but when I mention it to the doctor or anyone, I get no answer, and no one even checks her throat . I have a MAJOR bias when it comes to the medical professionals.

The above should say my mom has Parkinsons and Alzheimer’s