I used this chart as it was the closest thing I could find for my Nigerian Dwarf Goats. Just get a tape measure and measure the heart girth then see the chart below to get your weight. Hope you can read the chart the columns didn't line up just right. Also included dosage instructions that I used and found at
http://www.barnonemeatgoats.com/worms.html.
Weight Chart
Pygmy Goats
If hearth girth is under 22 inches, it is advised to use the scale method to determine accurate weight.
Bucks Does
Inches Pounds Inches Pounds
22 32 22 28.3
23 34 23 32.3
24.2 42 23.5 38
25.5 46 26 43
26.5 50 27.5 49
27.5 57 28 55
28 60 28.5 58
28.7 63 29 62
30 71 30 68
31 76 31 72
32 80 32 77
33 80
Brand Name: Eprinex (Ivomec)
Active Ingredient(s): eprinomectin 5mg
Availability: OTC
Withdrawal: No slaughter or milk withdrawal on cattle
Indications: Control of internal and external parasites
Dosage: 5ml per 100 lbs. applied topically (pour-on)
Goat Notes: 1 ml per 10 lbs. Great for treating kids; although a larger amount is needed per pound,
small goats can be accurately dosed.
Used frequently in dairy goats(No milk withdrawal) at 2-3 times the cattle dose.
Almost forgot, I found Jeffers to be the cheapest at the time I purchased.
Hope this helps.