Help to complete five quests (Divinity: Original Sin 2)

Guys, tell me how to get the five quests: hostile takeover; When to count chickens; Competitors; Man and his dog and Bestial treatment?
In the first town alone can take away a chest, but if you say that the leprechaun Liam, told us that he killed him, then he excuses and no logical conclusion is not happening, except to kill directly in his taverna, but this is not the way.
Second, once squeak gets older we should take him to his father, a magic rooster, but if you approach it with a squeak and ask him if he knows about his son, he will say that if you find one bring it, and the dialogue ends with his son he does not pay attention.
In the third, coarse Grog the Troll on the bridge asking to kill his rival Marga, but he in turn is offended, and asks the contrary to kill him. Impossible to kill since he had over 6K health and the vulnerability helps.
In the fourth, after he had caught the beggar-cheater and talked to the dog and helped her, she runs away, but the quest is not completed, what needs to be done?
In the fifth, after a conversation with the cows in the field, they are asked to spell them, I visited the house of the witch that got into the basement, but there's dozens of exploding rats, and find a potion for cows, I could not, though found to the West of the witch.

UPD 1.: After a couple hours running around the woods with a squeak, his father nevertheless admitted him.
UPD 2.: After a few levels managed to kill Grog and Marg gave the award.