IMO, egg yolks are a great addition to any kitty diet. One a week is a wonderful, high protein nutrition-packed snack with healthy omegas. They're packed with choline, that apart from having the GI system benefit, may also help prevent dementia when kitty gets older. Choline supplementation has been shown in numerous human studies to reverse Alzheimers and Alzheimers-type dementia.
As to the regurgitation after a meal, are you feeding wet or dry food? If dry, then you need to slow the eating down by feeding on a plate, or putting a large rock in the dish so it's hard to gobble. If the regurgitation is after eating wet, it's most likely due to bile build-up. Just buy some freeze dried meat treats, and if running late, feed one or two small pieces. Let those absorb the stomach acid for 10 minutes or so, then feed the meal.
The regurgitation after a meal for either of those reasons isn't inherently dangerous per se, but it's not good for the esophagus to be subjected to stomach acid that frequently.
As to the regurgitation after a meal, are you feeding wet or dry food? If dry, then you need to slow the eating down by feeding on a plate, or putting a large rock in the dish so it's hard to gobble. If the regurgitation is after eating wet, it's most likely due to bile build-up. Just buy some freeze dried meat treats, and if running late, feed one or two small pieces. Let those absorb the stomach acid for 10 minutes or so, then feed the meal.
The regurgitation after a meal for either of those reasons isn't inherently dangerous per se, but it's not good for the esophagus to be subjected to stomach acid that frequently.