Even small amounts of tobacco can be harmful to dogs, particularly puppies
[,,] Mental health Tobacco use is closely linked to a range of mental health conditions, including depression, anxiety, and stress
M., Ranga G., and Agarwal A., Relationship Between Semen Quality and Tobacco Chewing in Men Undergoing Infertility Evaluation, Fertility and Sterility
The essential assumptions for regression were tested: normality of residuals (probability-to-probability plot), linearity (scatter plot of relationship between BI and chemosensory function), homoscedasticity (scatter plot of residuals), and the absence of multicollinearity (correlation coefficients between predictors and variance inflation factor)
The best way to avoid this is to refrain from or quit smoking