Why use antifreeze when you can use the dip.

Good Idea, thanks for sharing.
The traditional term for men who feel bad for trapping, drowning, and deodorizing mice in a pink pool of propylene glycol is "Ladyboys". But the new generation calls them "sensitive".
From MSDS of high strength RV antifreeze.
http://images.peakauto.com/Peak%20RV%20marine%20AF%20-100%20Rev%202.pdf11. TOXICOLOGICAL INFORMATION
Skin: The LD50 for skin absorption in rabbits is >10,000 mg/kg.
Ingestion: The oral LD50 for rats is 20,000-34,000 mg/kg.
Mutagenicity: In vitro mutagenicity studies were negative. Animal mutagenicity studies were negative.
12. ECOLOGICAL INFORMATION
Movement & Partitioning: Based largely or completely on information for similar material(s), i.e., propylene glycol. Bioconcentration potential is low (BCF less than 100 or Log Pow less than 3). Log octanol / water partition coefficient (log Pow) is –0.92. Henry Law Constant (H) is 1.2E-8 atm.m3/mole.
Degradation & Transformation: Based largely or completely on information for similar material(s) i.e., propylene glycol. Biodegradation under aerobic static laboratory conditions is high (BOD20 OR BOD28/Th0D greater than 40%). Biodegradation is expected to be achievable in a secondary wastewater treatment plant. 5-day biochemical oxygen demand (B0D5) is 1.16 p/p. 200-day biochemical oxygen demand (B0D20) is 1.45 p/p. theoretical oxygen demand (TH0D) is calculated to be 1.68 p/p. Inhibitory concentration (IC5O) in OECD Activated Sludge Respiration Inhibition Test (OECD Test No. 209) is greater than 1 gm/L. Degradation is expected in the atmospheric environment within minutes to hours.
Ecotoxicology: Based largely or completely on information for similar material (s), i.e., propylene glycol. Material is practically non-toxic to aquatic organisms on an acute basis (LC50 greater than 100 mg/L in most sensitive species).
Acute LC50 for fathead minnow (Pimephales promelas) is 4,600-54900 mg/L
Acute LC50 for guppy (Poecilia reticulata) is greater than 10000 mg/L.
Acute LC50 for water flea Daphnia magna is 4850-34400 mg/L
Acute LC50 for rainbow trout (Oncorhynchus mykiss) is 44mL/L (about 44000 mg/L)
So... 20-34 grams of product per kg of body weight to kill half a rat population. thats 2-3% of a mouses body weight to die. I would need to drink about half a gallon of antifreeze to have a 50% chance of death. Also, the product degrades readily enough that we can dump it down the drain or on our garden.