\documentclass{article}
\usepackage{./lostdog}
% YOUR FRIEND INFO CHANGE IT ONLY HERE=================================
\newcommand{\pupsName}{Daisy} %NAME
\newcommand{\pupsBreed}{Dalmatian} %BREED
\newcommand{\marksInfo}{Heart shaped spot on her tail, one eye black spot, one eye white. Answers to her name. She needs medicine right away, family misses her.} %info: Marks, color, identifying info
\newcommand{\lastSeen}{Corner of Fifth st and Elm, Our City, State - Jan 12th 8:00 a.m.} %where did you see them for the last time
\newcommand{\contactPhone}{(821) 555-1212} %your cell phone
\newcommand{\contactEmail}{DaisysFamily@gmail.com} %your mail
\newcommand{\reward}{\$100} %optional reward
%======================================================
\begin{document}
\begin{mybox}[]
\centering{ \fontsize{100}{70}\selectfont{ \textbf{LOST DOG}}\\ \fontsize{50}{70}\selectfont{ \textbf{REWARD: \reward}}}
\end{mybox}
\vspace{5.6in}
\begin{mybox}[]
\centering{ \fontsize{40}{20}\selectfont{ \textbf{``\pupsName" the \pupsBreed}}\\
\centering{ \fontsize{22}{5}\selectfont{\textbf{\marksInfo \\ Last seen: \lastSeen}}}
\fontsize{40}{50}\selectfont{ \textbf{Contact: \contactPhone}}\\
\fontsize{40}{70}\selectfont{ \textbf{Email: \contactEmail}}}
\end{mybox}
\end{document}
