WEIGHT CHART / 01
Standard Manchester Terrier
Adults about 12 to 22 lb
Rat Terrier puppy weight calculator
Rat Terrier adults usually weigh about 10 to 25 lb and are close to full size by about 12 months. A typical 12-week-old Rat Terrier weighs about 3 to 7.5 lb.
Rat Terrier adults usually weigh
about 10 to 25 lb
At 12 weeks, Rat Terrier puppies are typically about 30% of their adult weight, with most of their growing still ahead.
Estimates vary, and every puppy grows at their own pace. Ask your vet about your puppy’s growth.
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Typical Rat Terrier weight by age
| Age | Typical weight |
|---|---|
| 8 weeks | 2 to 5 lb |
| 12 weeks | 3 to 7.5 lb |
| 16 weeks | 4 to 10 lb |
| 5 months | 5.5 to 14 lb |
| 6 months | 6.5 to 16 lb |
| 9 months | 8.5 to 21 lb |
| 12 months | 9.5 to 24 lb |
| 18 months | 10 to 25 lb |
Puppies sit above and below these figures, and every puppy grows at their own pace. Ask your vet about your puppy’s growth.
Rat Terrier questions
How big will my Rat Terrier get?
Most Rat Terrier adults weigh about 10 to 25 lb. Individual dogs vary, and the parents' size is often a helpful guide.
When do Rat Terrier puppies stop growing?
Rat Terrier puppies are usually close to adult weight by about 12 months. At 6 months a typical Rat Terrier weighs about 6.5 to 16 lb, around 63% of adult weight.
How much does a 12-week-old Rat Terrier weigh?
Typically about 3 to 7.5 lb, and by 16 weeks about 4 to 10 lb. Puppies sit above and below these figures, and every puppy grows at their own pace. If you have questions about your puppy's growth, ask your vet.
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