For pet owners, watching a beloved dog show signs of cognitive decline due to dementia can be a heartbreaking experience. Paola Kulsrud of @3crazyhuskies on TikTok is going through this difficult reality with her 15-year-old husky Mehkia. In a viral TikTok video with nearly 10 million views, Kulsrud shared footage of her oldest dog, Mehkia, pacing around the house, confused and unable to settle at 3:30 a.m. at night. “Sundowner syndrome really breaks my heart,” she wrote in the captions. “Just ordered some dog melatonin to see if that will help. Taking old buddy in to see his vet this Friday. …