Chomper's parents...
In second movie, they were first adult Sharpteeth after all-favorite Sharptotoh from original movie.
As first post-original antagonistic predatory force, in second movie, they were good for that time. Yes, they were not so dangerous, scary and insuperable like first Sharptooth, but were far away from being waking joke or being shame upon sharpteeth kind. Besides being Chomper's parents function, I believe they were perfect characters that perfectly maintained their other important functions.
Since times of original movie, we saw appearance of other adult sharpteeth, we saw how they stepped in the plot, we saw how gang run away from them, we saw how gang fought them, we saw how gang's relatives fought them, we saw how all Great Valley residents joined to take them out from Valley. In other word, thanks to them, we were witnesses of many new situations inside LBT universe. How gang managed to survive other sharpteeth and be more brave to make an counter-attack to safe each other and members of their families. How peaceful valley can be attacked by predators. And the main thing - how valley residents, how different types of dinosaurs, where many of them were racist enough, taking LBT1 into consideration, made a try to stand together against general enemy. (plus, we saw how cool old granparents are! ^^)
And - how I told a couple times before, intrioducing Chomeprs AND his parents are one of my favorite things in LBT sequels. We saw that sharpteeth in general are not soulless machines and just like protagonist characters and their families: they can be parents, they can love someone, they can hunt to feed themselves and other members of family, and they can attack someone to protect other members of family. Introducing Chomper and his parents changed everything we knew before in LBT storytelling. It can make you to take some deep thoughts... And I love it.
LBT5 were further and logical progress of their characters. We saw how they cared about Chomper, we saw how they accepted their son as he is, despite his "difference" from other sharpteeth, we again saw how they protected Chomper and themselves. And the most important thing - they are first sharpteeth besides Chomepr who interacted with gang not as predator-prey, but as character-character. They realized that Littlefoot are very important to their son, they saw how he risked his own life to save their son. Very possibly, it was the first time in their life when themselves saw leafeaters not as food but as individuals who can "peacefully interact" with their mortal enemies. And their acceptance the gang and their honest promise about not intentionally harming gang while they stay in the island show all nature of these charcters. I just love them!
So, maybe Chomper's parents are not THE MEANEST AND DANGEROUS sharpteeth, or they have lack of some "charisma" or "feature" that make you adore them as characters like main cast, but for me, they are one of the most important characters in LBT universe, and I respect them very well. Thank you, Sharptooth Mom and Dad.

I hope you'r safe and sound during events of LBT TV series, and Ruby's and Chompers' promise to them were not some kind of last promise they took, and we will see them in the future.
About questions...
1) Well, two movies and their screentime didn't show us daily life of sharptooth family, how parents treat their child during the day. But from what we have seen, they deeply love their son, and accept him no matter what, even if he collcts green food or makes a friends with meat food.

2) I believe their honest promise about not intentional harming the gang. So maybe they would tell Chomper to tell him friends when and where they usually hunt, to not risk their lives during hunting period, in case if during the hunt they step inside "berserk mode".