The bottle jaw is an indication of worms, after the worms are gone...the bottle jaw will still be there. It's an overload of "liquid" from the damage the worms have done in the stomach - typically the barber pole worm.
You have to find out which wormer is effective in your area. For instance, ivermectin is no longer effective around here. I can't use it and expect it to work. So.... I've reduced the amount of times I worm. Boers are highly susceptible to worms, too. They have been inbred so much, they can't fight them off. I've lost one to worms and had to take two to the vet for extreme treatment.
Okay, back to the bottle jaw. Bottle jaw is indicative of SEVERE anemia. You need to feed iron. And you may have to feed it for several weeks until the bottle jaw goes away...along with the vitamin B. I use the iron tabs from Wally or the dollar store - 65mg. I give 2 in the morning, two at night. You can add raw spinach or frozen spinach, as well as oatmeal with a touch of molassess. All are high in iron. Mine don't like oatmeal unless it's cooked. So I cooked oatmeal, about a cup, added a cup of frozen spinach, a dash of molassess, and two iron tabs all mashed together.
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