Q. Lump on right leg
A. Lumps should always be examined to determine their cause. It is more concerning if they are fast growing, change in size, are itchy, bleed etc. But even normal lumps that do not display these characteristics can be serious.
Some lumps can be fat lumps which are not anything to worry about. Others can be serious as they may be cancerous. These are best to be evaluated by your vet who can (aspirate) take a sample using a needle and see what type of matter is in them and advise on treatment from there.