How to buy a good animal,goat,lamb,cow,camel for bakraeid(eid ul azha)?

The sign of Good animal for bakraeid are
*it's lower spinal cord(pooth) shoul have good amount of muscle(meat)
- you can also find thick veins because     thick veins indiacate animals muscularity
*it's chest should have muscles with some fat on top of that
- you can judge by your hand
*don't judge animal by its stomach area
  In this area only fats are present. It may lool good but don't give it your priority.

Note:
*if you want to purchase it some days before eid then try to find that animal which is good in eating.
-generally animals eat less when you will change it's actual surrounding.
-it may refuce more than 5kg of weight by not eating.

Thank you