Some of this is not a training problem, and treating it like one wastes time your dog may not have. If they are distressed when you leave, if they growl or guard their food, their toys or you, if they are frightened on the lead, or if anything about them changes suddenly at any age, contact your vet the same day. A tip from a website, ours included, is not the answer. If it cannot wait, contact your nearest emergency vet now.
With a Cattle Dog, check their hearing before you call it stubbornness. A puppy who does not wake when you come in, or a dog who only responds when they can see you, may be deaf in one or both ears. In their prime, weight gain, a dull coat and less energy can be an underactive thyroid. A new reluctance to jump, or stopping on walks, can be the hips or elbows. In an older Cattle Dog, restlessness at night or getting lost in the house can be the start of cognitive decline. Bloat (GDV, a twisted stomach) can happen in any dog, though it is most common in large, deep-chested breeds. A swollen, tight belly, retching with nothing coming up, sudden restlessness or drooling is an emergency: contact your vet now.
They'll keep choosing when they hear you. If they stop hearing the treat bag, call your vet.