The animal polyjuice potion

Estimated Brewing Time:

Pewter cauldron: 30 days 20 hours and 4 minutes to 19 hours, 33 minutes and 18 seconds
Brass cauldron: 30 days 18 hours, 56 minutes and 1 second to 18 hours and 7.6 seconds
Copper cauldron: 29 days 19 hours, 2 minutes and 4.3 seconds to 16 hours, 30 minutes and 9 seconds

Ingredients:

3 L water
12 lacewing flies1
28 g Antimony
4 leeches
5.25 g fluxweed2
12 g Sal ammoniac
60 g knotgrass
15 g powdered horn of bicorn
30 g shredded skin of boomslang
5 g saltpeter
5 g mercurys
5 g Pulvis Martis
18 mL of cat tongue saliva
12 doxy wings
Genetic material of the one you wish to become

Instructions:

1. Add three L of water to the cauldron and heat to 321 Kelvin (47.85°C/118.13F)
2. Five point three five g of fluxweed to the cauldron
3. sixty g of knotgrass to the cauldron
4. Stir four times clockwise and three times counter-clockwise
5. Let the potion brew for 80 minutes (for a pewter cauldron. A brass cauldron will require 68, and a copper one only 60)

Potion should be a glowing dark green and smoking in spirals

Instructions 2:

1. Add four leeches to the cauldron
2. Add six g of lacewing flies to the mortar, crush to a fine paste, then add six g of the crushed lacewings to the cauldron
3. Heat for 30 seconds at 253 Kelvin (-20.15°C/-4.27°F) then return heat heat to 321 Kelvin (47.85°C/118.13F)
4. Add eighteen mL of cat tongue saliva to the cauldron
5. Stir 5 time counter-clockwise

Potion should now be grey and scentless

Instructions 3:

1. Add thirty g of shredded skin of boomslang to the cauldron
2. Add fifteen g of powdered horn of a bicorn to the cauldron
3. Heat for 20 seconds at 547 Kelvin (273.85°C/524.93°F) then return heat heat to 321 Kelvin (47.85°C/118.13F)
4. Wave your wand
5. Let the potion brew for 24 hours (for a Pewter Cauldron. A Brass Cauldron will only require 1224 minutes, and a copper one only 18 hours)

Potion should now be brown and bubbling

1. Add six of lacewing flies to the cauldron
2. Stir three times counter-clockwise and two times clockwise
3. Split potion into multiple doses, if desired, then add the piece of the animal you wish to become
4. Let brew for time above

Potion should be a bubbling light purple