I wanted to get some additional information from you, but I will answer your question now, and if you need any further information, just let me know.
It sounds, from your description, that constipation is still an issue on and off, depending on how much fur she actually ingests during self-grooming. Her previous behavior, which seemed 'psychotic', was most likely a condition called feline psychogenic alopecia, which is an obsessive-compulsive disorder, in which a cat will over-groom due to stress or anxiety.
Because the Laxatone doesn't seem to be agreeing with her, you might offer her an ounce of whole milk, once a day, which is a natural laxative, as most cats are lactose intolerant. You can also mix 1 tsp. of plain, canned pumpkin (not pie filling) into a small amount of her wet food, twice a day; the natural fiber will be beneficial. Instead, you might also try plain, jarred baby food pumpkin or sweet potato.
I'm glad you changed to Nutrish and she likes it. She should only be eating wet food and you can add a little water or tuna water from canned tuna to each feeding, providing extra moisture. The Science Diet Hairball formula dry food is not as healthy for her. If she likes 'grazing' on dry food, get a high quality, grain-free food, like Wellness, or EVO and leave out a small amount for the day.
You can also encourage her to drink more, by getting a cat drinking fountain; cats love drinking from a moving water source. More water/moisture will help her pass stools and hairballs more easily.
Ask your vet if you can add a very small amount (1/4 tsp.) of Metamucil to her wet food; that should help also.
Please keep in mind to do only one of these things at a time, to encourage her to have more regular b.m.'s--don't give all at once or she'll have loose stools.
I hope all will be well with Miss Mericka!
I hope you found this answer helpful and will please take a moment to select a positive rating from the stars at the top of your page, then click 'submit;' this is the only way I will receive credit for assisting you. Thank you very much!
Even after rating, I will always be available if you need additional information; just click 'reply' and I will be glad to continue.